Areaction contains two reactants, a and b. if a is doubled, there will be a greater number of effective collisions between reactants. true false

the answer would be c

some sources quote the lethal dose, for an average 170lbs opiate-naive individual is between 75 and 375 mg

ca has a crystalline lattice with positive ions (since it is a metal, metals are positively charged) and electrons flow freely in its structure since the ca atoms have a large nuclear radius so the electrons are not tightly held, therefore the electrons can flow freely since they are not being highly attracted by the nucleus. moreover, one of the properties of metals are that they are conductors of electricity, thus proving ca is the element.